Finding the Fourth Proportional to 87,694.88, 121,018.79 and 47,408.68
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Solution
The fourth proportional to 87,694.88, 121,018.79 and 47,408.68 is: 65,423.90
Step by Step Solution
- Step 1: Write the proportion equation
87,694.88 : 121,018.79 = 47,408.68 : x - Step 2: Convert to fraction form
87,694.88/121,018.79 = 47,408.68/x - Step 3: Cross multiply
87,694.88x = 121,018.79 × 47,408.68 - Step 4: Simplify right side
87,694.88x = 5,737,341,089.10 - Step 5: Solve for x
x = 5,737,341,089.10/87,694.88 - Step 6: Final answer
x = 65,423.90
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.